Is there a cheap and effective way to accomplish getting my tenants to pay their own water?

Something like "mother in law apartment perfect for your extended family" or something to that effect.

I can get a good deal, but the number of purchases I can transact is limited by the capital I have.Here's a scenario that's pretty close to what I'm trying to accomplish:1) acquire property with an ARV of $350K for $200K cash.2) rehab, place tenant, season for 6 months3) after 6 months, do a cashout refi based on ARV $350K, and pull out ~$262.5K.

They always go the extra mile to make any wacky transaction happen.

The designation of opportunity zone remains in effect through the end of 2028. 

I think the wall units look cleaner but were not sure if they were as effective as the baseboard).On top of that was wondering if you would recommend the hydronic baseboard units or the standard convection heaters.I also noted your in NY are you using these to solely heat a house or as supplemental and do you feel they could adequately provide heat to a house in the NE during the dead of winter.

Certainly some factors, e.g. size of the facility, occupancy, geographic location (property taxes, hurricane or flood insurance) can effect this percentage.We consider a "stabilized Facility" to be 85%. 

Here is an in-depth article on the effect that the Dodd-Frank legislation has on owner financing.  

How do I follow through with the transaction and keep the property from going through the foreclosure process to secure the investment for me and the other investor?

A property on the "verge" of foreclosure closes no differently than any other on market transaction.